What do you call a group of wasps?

Answer: swarm, hive, colony

A group of wasp is called a swarm, hive, colony. A wasp is any insect of the order Hymenoptera and suborder Apocrita that is neither a bee nor ant. The suborder Symphyta, known commonly as sawflies, differ from members of Apocrita by having a broader connection between the mesosoma and metasoma. In addition to this, Symphyta larvae are mostly herbivorous and caterpillarlike